2) Hydrogen Bonding -strongest permanent dipole-dipole
-occurs when Hydrogen bonds with Oxygen, Fluorine, or Nitrogen
-negatively charged F is attracted to positively charged H http://www.lbl.gov/images/MicroWorlds/H2OH-bond.gif
3) London Forces -exist between all molecules, weakest intermolecular force
-occurs when molecule becomes temporarily polar: electron density moves around, and is generally not distributed throughout molecule evenly
-this creates a temporary dipole
-negatively charged side of molecule is attracted to positively charged side of another http://www.youtube.com/watch?v=3t1Jn_jrsQk&NR=1
Intermolecular Forces
There are three main types:
1) Dipole-dipole
-between polar molecules
-eg. HCl is polar covalent
-Negatively charged Cl is attracted to positively charged H
http://images.google.ca/imgres?imgurl=http://library.tedankara.k12.tr/chemistry/vol2/dipole-dipole%2520forces/z105.jpg&imgrefurl=http://library.tedankara.k12.tr/chemistry/vol2/dipole-dipole%2520forces/z105.htm&usg=__RKXhOjYKFKeY99iLbo0gjBrpd_o=&h=570&w=409&sz=65&hl=en&start=4&um=1&tbnid=ljWYJbTg9PFPAM:&tbnh=134&tbnw=96&prev=/images%3Fq%3Ddipole-dipole%26um%3D1%26hl%3Den%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en-GB:official%26sa%3DN
2) Hydrogen Bonding
-strongest permanent dipole-dipole
-occurs when Hydrogen bonds with Oxygen, Fluorine, or Nitrogen
-negatively charged F is attracted to positively charged H
http://www.lbl.gov/images/MicroWorlds/H2OH-bond.gif
3) London Forces
-exist between all molecules, weakest intermolecular force
-occurs when molecule becomes temporarily polar: electron density moves around, and is generally not distributed throughout molecule evenly
-this creates a temporary dipole
-negatively charged side of molecule is attracted to positively charged side of another
http://www.youtube.com/watch?v=3t1Jn_jrsQk&NR=1